in deep part of superior colliculus layer of superior colliculus deep layer of superior colliculus BM:MB-Tec-SCD BAMS:SCD The innermost layer of the superior colliculus. superior colliculus, deep layer UBERON:0006793 DHBA:12301 grouping teleost assuming homology of superior colliculus and optic tectum; however, this is dubious as tectal layers vary so widely. See: http://icb.oxfordjournals.org/content/42/4/743/T1.expansion.html